The invention relates to an antirust oil spraying device, and in particular relates to a rapid mechanical component antirust oil spraying device. The technical problem to be solved by the invention is to provide the rapid mechanical component antirust oil spraying device which is uniform in spraying, saving in material, and convenient to operate. In order to solve the technical problem, the invention provides the rapid mechanical component antirust oil spraying device comprising a base plate, a left rack, a box, a water pipe, a first check valve, a cylinder, a piston, a flexible pipe, a processing frame, a right rack, a screen plate, a sprayer, a second check valve and a top plate, wherein the left rack is welded with the left side of the top of the base plate, a first fixing rod is welded with the upper part of the right side of the left rack, and a motor is connected with the first fixing rod via a bolt. According to the device provided by the invention, the effects of being uniform in spraying, saving in material, and convenient to operate are achieved, and the device is low in manufacturing cost, reasonable in structure, prone to maintain and repair, convenient to use, reduced in investment of manpower and material resources and improved in work efficiency.